Article continues below advertisementKaty Perry's birthday cake is the one that got away.In a now-viral video, the pop star, 41, dropped the celebratory dessert backstage at her Lifetimes Tour. After she blew out the candles on a sheet cake, Perry attempted to throw it at a man wearing a suit across the room - instead, the treat collapsed on the floor.Article continues below advertisementSource: @katherinejaayne/XKaty Perry dropped her birthday cake on the floor.As the singer burst into laughter, her backup dancers knelt down and scooped up cake with their bare hands.